NinjaTrader Mama/Fama indicator

HI everyone:

I would like to convert the following NinjaTrader indicator to cTrader (if it is already converted, please let me know where I can find it! :-) ) :

https://github.com/redrhinofx/NinjaTrader.Base/blob/master/NTBase/Indicator/%40MAMA.cs

While it seems pretty straight forward, the issue/problem I'm having is converting the private DataSeries variables into a cTrader equivalent.

For example, this code:

//HOW WOULD THESE BE DECLARED IN CTRADER?
private Series<double>		detrender;
		private Series<double>		smooth;

		protected override void OnStateChange()
		{
			if (State == State.SetDefaults)
			{
				FastLimit					= 0.5;
				IsOverlay					= true;
				IsSuspendedWhileInactive	= true;
				SlowLimit					= 0.05;

				AddPlot(Brushes.Goldenrod,	NinjaTrader.Custom.Resource.NinjaScriptIndicatorDefault);
			}
			else if (State == State.DataLoaded)
			{
//HOW WOULD THESE GET INITIALIZED IN CTRADER?
				detrender	= new Series<double>(this);
				smooth		= new Series<double>(this);
			}
		}

		protected override void OnBarUpdate()
		{
			if (CurrentBar < 6)
				return;
			if (CurrentBar == 6)
			{
				Default[0]	= (High[0] + Low[0]) / 2;
				Fama[0]		= Input[0];
				return;
			}

			double period1	= period[1];
			smooth[0]		= (4 * Median[0] + 3 * Median[1] + 2 * Median[2] + Median[3]) / 10;

//HOW IS "DETRENDER[0]" assigned when it doesn't appear that "SMOOTH[2]" has been set? 
//I don't know how "smooth[2]", "smooth[4]", etc, are set, or initialized. Can anyone help?
			detrender[0]	= (0.0962 * smooth[0] + 0.5769 * smooth[2]
								- 0.5769 * smooth[4] - 0.0962 * smooth[6]) * (0.075 * period1 + 0.54);

How is "smooth[2]" set and where is its value coming from? Is it just the closing price of the 2nd bar for any given time frame?

Thank you,